APA Style

Guffey, M, E., Loewy, D. (2015). Mary Guffey Essentials Of Business Communication 2016 (10th ed.). : Cengage Learning.

MLA Style

Guffey, Mary, Ellen., Loewy, Dana. "Mary Guffey Essentials Of Business Communication 2016". 10th ed. : Cengage Learning, 2015. Text.